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MN-29805 • Rev 10 • 06/17 • Combitherm CT Express Installation Manual
Service
Error
Code
Error Call Out in Display
Description of Error
Possible Causes
E11
Convection Temperature
High
Oven cavity temperature N6
too high
— Convection element contactor stuck closed/on.
— Faulty oven temperature probe connection at relay board.
— Faulty N6 oven temperature probe.
— Faulty relay board.
E13
Boiler Temperature High
Steam generator
temperature too hot
— Immersion element is not submersed in water due to scale build
up on the water level probe/inside the tank.
— Immersion element contactor stuck closed.
— Faulty B4 steam generator temperature probe connection at
relay board.
— Faulty B4 temperature probe.
E15
Condensor Temperature High Condensor water
temperature too high
— Untreated water supply line is disconnected or
shut off .
— Cooling solenoid is not being energized when B3 probe is above
set point.
— Faulty B3 condensate temperature probe connection at
relay board.
— Faulty B3 condensate temperature probe.
E20
HACCP Only - B11 Core
Temperature Probe Single
Point Fault
Error E20 is not shown in
display. Instead a probe
sign with “?” is shown as
popup window. In case
the customer cooks in time
mode during first step and
during second step switches
to probe mode but has no
probe in place, the error E20
will be shown in the error
code list and HACCP list.
Single point core
temperature probe defect
or disconnected
— Probe not installed inside oven.
— Faulty B11 Single Point Core Temperature probe receptacle
connection at relay board.
— Faulty B11 single point core temperature probe.
— Debris buildup on probe receptacle pins inside of
the oven.
E21
N6 Oven Cavity Temperature
Probe Fault
N6 probe “open”
— Faulty N6 oven cavity temperature probe connection at
relay board.
— Faulty N6 oven temperature probe.
E22
B10 Core Temperature
Probe Multipoint Fault
Multipoint core temperature
probe defect or
disconnected
— Faulty B10 multipoint core temperature probe connection at
relay board.
— Faulty B10 multipoint core temperature probe.
E23
B4 Boiler Probe Fault
B4 probe “open”
— Faulty B4 boiler temperature probe connection at relay board.
— Faulty B4 boiler temperature probe.
E24
B5 Bypass Probe Fault
B5 probe “open”
— Faulty B5 steam bypass probe connection at
relay board.
— Faulty B5 steam bypass probe.
E25
B3 Condensor Probe Fault
B3 probe “open”
— Faulty B3 condensor probe connection at relay board.
— Faulty B3 condensor probe.
E26
N8 Immersion Element
Safety Probe Fault
N8 probe “open”
— Faulty N8 safety temperature probe connection at relay board.
— Faulty N8 safety temperature probe.
Error Codes
Continued on next page
